Ore-screening machine.



No. 825,081. PATENTED JULY 3,1906

'A. SGHWARZ. ORE SCREENING MACHINE.

APPLICATION FILED JULY 12, 1905.

WITNESSES:

E clef-01%;

v INVENTOR o v f Mm? I c/ ATTORNEY UNITED STATES PATENT OFFICE.

ALFRED SCHWAR-Z, OF NEW YORK, N. Y., ASSIGNOR TO SCHWARZ ENGINEERINGCOMPANY, OF NEW YORK, N. Y., A CORPORA- TION OF NEW YORK.

Specification of Letters Patent.

Patented July 3, 1906 Application filed July 12, 1905. Serial No.269,327.

To all whom it may concern.-

Be it known that I, ALFRED SCHWARZ, a subject of the German Emperor, anda resident of the borough of Manhattan, city, county, and State of NewYork, have invented certain new and useful Improvements in Ore-ScreeningMachines, of which the following is a specification.

The present invention relates to a shakingscreen which is capable ofgeneral application to uses to which such devices are adapted, but whichhas been designed by me more particularly for the screening of ores.

Theinvention will be understood. by reference to the accompanyingdrawings, in whicl1- Figure 1 is a side view of the machine, and Fig. 2an enlarged detail view of a part thereof.

Similar reference-numerals indicate similar parts in both the views.

Referring to the drawings, the machine is supported in a suitable framecomprising sills 1, uprights 2, and cross-bars or cappieces 3. Theseparts are securely bolted together to constitute a rigid framework. Thescreen comprises two sections, the upper consisting of a rectangularframe 4 of suitable timbers, or it may be of-metal, bound together bycorner-braces 5. A frame 6, usually of wood, has secured to its lowerside a screen-cloth 7, and said frame rests upon and is bolted to theframe a. The lower section is constructed in a similar manner. Itcomprises a rectangular frame 8, the sides and ends of which are securedtogether by cornerbraces 9 and supports the frame 10, to which the cloth11 is secured. The cloth 7, which is of wire, is usually from about tento twenty mesh and the cloth 11 of'much finer mesh, ranging from abouttwenty to one hundred, according to the fineness of the ore desired.

The frames 4 and 8 are secured together in substantially parallelrelation by plates 12 and 13, bolted thereto, said plates being usuallyin the form of castings. There are four of these plates, two being onthe side opposite to that of the View given in the drawings. The twoplates 12 are of less length than that of the plates 13 for the purposeof inclining the screens forward.

In the lower ends of the plates 12 and 13 are secured studs, on whichare mounted rollers 14, said rollers being preferably grooved andadapted to rest upon and travel over plates 15, bolted to the sills 1.Said plates are formed with raised or cam surfaces 15, which give ajogging motion to the screens when the latter are reciprocatedlongitudinally by the following means: Secured to the outer sides ofplates 12 and 13 are studs 16 and 17, respectively, to engage slots inthe lower ends of rods 18 and 19, there being similar rods on theopposite sides of the machine from that shown. The rods 18 and 19 attheir upper ends are secured to rocksha-fts 20 and 21, respectively,which shafts extend across the top of the frame and are supported inbearings 22 and 23, secured to the beams 33. Supported in brackets 24,secured to the uprights 2, is a shaft 25, which carries a pulley 26,adapted to receive a belt from a suitable source of power. On the shaft25 is mounted an eccentric 27, the rod 28 of which is connected at itsouter end to a cross-bar 29, said bar being secured to and extendingbetween the two upright rods 18. Extending transversely of the twoscreen-sections is a wall having side pieces 30, the purpose of which isto preventany material from falling from the upper screen outside thelower screen. Connected to the frame 6 is a chute 31, leading to asuitable bin to carry off the oversize fromthe upper screen, and 32 is asimilar chute leading from the lower screen to carry off the oversizefrom the latter.

The operation of the machine will be readily understood from the abovedescription. By reason of the eccentric connection the two screens aregiven a longitudinal reciprocatory movement and by reason of thecamsurfaces 15 a vertical jogging movement, the resultant of these twomovements effecting a complete screening of the ore; Theore to bescreened is fed to the upper section 4 by any suitable means, thematerial passing through the cloth 7 fallingto the lower section 8. Thematerial that passes through the cloth 11 is collected in asuitable binor hopper. The oversize from the sections 4 and 8 are carried off by thechutes 31 and 32, respectively.

, The'shaft25 in practice makes about, one hundred and twenty -'iiverevolutions per minute, and the throw of the eccentric is lower one to aposition sligh number may be employed. The manner of securing the frames6 and 10 to the frames 4 and 8,respectively, renders them removable whenit is necessary to renew the screen cloths? and 11 or to replace them bya cloth of diiferent'mesh;

As shown in the drawings, the screen-sections are inclined forward, thusthrowing the advance of the upper section.

What I claim, and desire tej ters Patent, is

1-. A screen comprising aplrrrahty of sections secured together by airsof plates one pair being of less length t an the other and thesaidsections secured thereto in substan tial parallel relation in planesinclined to a horizontal plane, cam-surfaces over which said plates areadapted to be moved, and means for imparting a longitudinal reciproeating movement to the'scieen-sections.

,A screen comprising a plurality of sections secured together by pairsof plates, studs carried by said plates, pairs of vertical ie byLetrod's having slotted ends for engaging said studs, rock-shafts to'which said rods are secured, means for imparting a vertical joggingmovement to said sections, an eccentric-andpitman connection to saidrods, and means for-actuating said eccentric. V

3. A screen comprisin a plurality ofsections secured together y pairs ofplates, rollers supported by said plates, cam-surfaces upon which saidrollers rest and upon which they are adapted to be moved, studs carriedby said plates, nairs of vertical rods engaging said studs, rockshaftsto which said rods are secured, and means for imparting through saidrods a longitudinal reciproeating movement to the screen-sections.

4. In a machine of the character described the combination of a frame,rock-shafts supported thereon, pairs of rods secured to said shafts saidrods having their lower ends slotted, a plurality of screen-sectionssecured together by plates, studson said plates engaging the slottedends of said rods, an eccentricanditman connection therefor to one pairof said rods to impart a reciprocating movement to the screen-sections,and means to impart a vertical jogging movement to said sections.

5. A,screen comprisinga plurality of sections secured together by pairsof plates, one pair being of less length than the other and the saidsections secured thereto in substantial parallel relation in planesinclined to a horizontal plane, grooved rollers supported by saidplates, cam-surfaces upon which said rollers rest and upon which theyare adapted to be moved, and means for imparting a longitudinalreciprocating movement to the screen-sections. V V

In witness whereof I have signed my name to this specification in thepresence of two subscribing witnesses."

' ALFRED SCHWARZ.

Witnesses: i 4

SAMUEL M. IVIARCUS, ()LIN A. FOSTER.

